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Siena vs Tusayan
Comparing Siena change · Tusayan change
Siena is the warmer of the two — about 5°C on the annual average; Siena is the wetter, with 536 mm more rain a year, and Tusayan the sunnier.
How the seasons compare
The differences between Siena and Tusayan, in everyday terms.
Summers
Summers are nearly the same
Siena: Hot
Tusayan: Warm
Winters
Siena has much milder winters
Siena: Chilly
Tusayan: Very cold
Rain & snow
Siena is much wetter
Siena: Moderate rainfall
Tusayan: Fairly dry
Sky
Tusayan is sunnier
Siena: Partly cloudy
Tusayan: Fairly sunny
Month-by-month charts
Temperature
Siena is the warmer of the two — about 5°C on the annual average.
Precipitation
Siena is the wetter — about 536 mm more across the year.
Clear skies
Tusayan has the clearer skies — the higher line.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°C) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 9 | 11 | 15 | 19 | 23 | 28 | 31 | 32 | 26 | 20 | 14 | 10 |
| Tusayan | 7 | 8 | 13 | 16 | 22 | 28 | 30 | 28 | 25 | 19 | 12 | 7 |
| Difference | -2 | -3 | -2 | -2 | -2 | — | -1 | -3 | -1 | -1 | -1 | -3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 9 | 11 | 15 | 19 | 23 | 28 |
| Tusayan | 7 | 8 | 13 | 16 | 22 | 28 |
| Difference | -2 | -3 | -2 | -2 | -2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 31 | 32 | 26 | 20 | 14 | 10 |
| Tusayan | 30 | 28 | 25 | 19 | 12 | 7 |
| Difference | -1 | -3 | -1 | -1 | -1 | -3 |
Avg low (°C) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 0 | 0 | 3 | 6 | 10 | 13 | 15 | 16 | 12 | 9 | 5 | 1 |
| Tusayan | -10 | -9 | -6 | -4 | -1 | 3 | 9 | 9 | 4 | -2 | -7 | -10 |
| Difference | -10 | -9 | -9 | -9 | -10 | -10 | -6 | -6 | -7 | -10 | -11 | -12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 0 | 0 | 3 | 6 | 10 | 13 |
| Tusayan | -10 | -9 | -6 | -4 | -1 | 3 |
| Difference | -10 | -9 | -9 | -9 | -10 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 15 | 16 | 12 | 9 | 5 | 1 |
| Tusayan | 9 | 9 | 4 | -2 | -7 | -10 |
| Difference | -6 | -6 | -7 | -10 | -11 | -12 |
Precipitation (mm) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 53 | 57 | 64 | 71 | 74 | 53 | 42 | 43 | 96 | 109 | 121 | 82 |
| Tusayan | 27 | 26 | 26 | 18 | 15 | 9 | 49 | 53 | 34 | 33 | 18 | 20 |
| Difference | -26 | -31 | -37 | -53 | -59 | -44 | +7 | +10 | -62 | -76 | -103 | -62 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 53 | 57 | 64 | 71 | 74 | 53 |
| Tusayan | 27 | 26 | 26 | 18 | 15 | 9 |
| Difference | -26 | -31 | -37 | -53 | -59 | -44 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 42 | 43 | 96 | 109 | 121 | 82 |
| Tusayan | 49 | 53 | 34 | 33 | 18 | 20 |
| Difference | +7 | +10 | -62 | -76 | -103 | -62 |
Cloud cover (%) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 65 | 61 | 62 | 65 | 62 | 50 | 36 | 39 | 53 | 62 | 69 | 65 |
| Tusayan | 48 | 49 | 46 | 41 | 37 | 27 | 50 | 46 | 32 | 32 | 37 | 48 |
| Difference | -17 | -12 | -16 | -24 | -25 | -22 | +14 | +8 | -20 | -31 | -32 | -17 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 65 | 61 | 62 | 65 | 62 | 50 |
| Tusayan | 48 | 49 | 46 | 41 | 37 | 27 |
| Difference | -17 | -12 | -16 | -24 | -25 | -22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 36 | 39 | 53 | 62 | 69 | 65 |
| Tusayan | 50 | 46 | 32 | 32 | 37 | 48 |
| Difference | +14 | +8 | -20 | -31 | -32 | -17 |
Relative humidity (%) Siena runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siena | 91 | 86 | 82 | 78 | 73 | 63 | 54 | 55 | 68 | 80 | 89 | 91 |
| Tusayan | 61 | 57 | 49 | 41 | 35 | 25 | 37 | 43 | 40 | 42 | 50 | 60 |
| Difference | -29 | -29 | -33 | -37 | -38 | -38 | -17 | -12 | -28 | -38 | -38 | -31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Siena | 91 | 86 | 82 | 78 | 73 | 63 |
| Tusayan | 61 | 57 | 49 | 41 | 35 | 25 |
| Difference | -29 | -29 | -33 | -37 | -38 | -38 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Siena | 54 | 55 | 68 | 80 | 89 | 91 |
| Tusayan | 37 | 43 | 40 | 42 | 50 | 60 |
| Difference | -17 | -12 | -28 | -38 | -38 | -31 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Siena trends → · Tusayan trends →
Methodology & sources
Siena
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Arezzo, about 45 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.
Tusayan
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Grand Canyon NP AP, a weather station, about 4 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.
← change Siena · change Tusayan → · Siena page · Tusayan page